function showNumberWithAnimation( i , j , randNumber ){

    var numberCell = $('#number-cell-' + i + "-" + j );

    numberCell.css('background-color',getNumberBackgroundColor( randNumber ) );
    numberCell.css('color',getNumberColor( randNumber ) );
    numberCell.text( getNumberText( randNumber ) );

    numberCell.animate({
        width:"100px",
        height:"100px",
        top:getPos(i),
        left:getPos(j)
    },50);
}

//移动动画
function showMoveAnimation( fromx , fromy , tox, toy ){

    var numberCell = $('._'+fromx*4+fromy);
    numberCell.animate({
        top:getPos( tox ),
        left:getPos(  toy )
    },200);
}